The Denodo Platform provides [Version Control Systems(VCS)](https://community.denodo.com/docs/html/browse/7.0/vdp/administration/version_control_systems_integration/version_control_systems_integration). By enabling VCS for a database allows you to compare only particular objects such as view, data source,etc from that database with the last version saved in the repository.
At the moment, Denodo Platform does not have any comparison tool to compare the objects of two different environments. If you want to compare elements of two different environments, then you can export the elements into the .vql file and then compare the VQL files of both environments using a text comparison tool.
Hopes this helps!